Devices, methods, and systems are provided for placing an implant into a patient and removing it therefrom.

In some examples, a system includes a medical device comprising an elongate body configured to advance through layers of tissue of a patient, a lumen extending through the elongate body, a fluid line configured to supply fluid to the lumen, and a pressure sensor positioned within the lumen or the fluid line. The system may further include processing circuitry configured to receive, from the pressure sensor, a signal corresponding to the pressure of the fluid at each of a plurality of time points, determine, for each time point: a corresponding amplitude value of the signal, a difference between two amplitude values of the signal, an amplitude oscillation status of the signal, a position of the elongate body based on the difference and the amplitude oscillation status; and provide an indication of the position of the elongate body relative to the layers of tissue.

An access port or retractor tube provides access through tissue to a surgical site or field, such as the brain or spine, in a minimally invasive manner. The access port permits a user to clearly view and access the surgical field, including areas medial thereto, in a minimally invasive manner by dilating or separating tissue rather than cutting tissue. Neuro monitoring and neuro navigation are tools essential to neuro surgery to protect vital and eloquent tissues. Combining navigation and monitoring into the access ports/retractor tubes would enable the surgeon to be more precise and efficient during minimally invasive procedures while still being maximally effective in protecting non operative tissues.

An improved transparent bladeless obturator includes a proximal handle, a distal-end portion and a shaft therebetween, the handle and the shaft including a generally-aligned axis aperture, the distal-end portion including a transparent tip, from the distal end to the proximal end, the transparent tip divided into a top-portion, a spear-portion, a transition-portion and a base-portion; the top-portion includes an apex and a rotary-wall extending axially from the apex to the proximal end and gradually increasing in a transverse direction, the rotary-wall limiting a hollow cone; the main-portion including a main-body wall, the rotary-wall and the main-body wall extend to be intersected and form a circular field of vision; the sweeping-wall extends axially from the distal end to the proximal end and gradually increases in a transverse direction; and the spear-portion includes the first transverse-portion and the second transverse-portion.

According to one embodiment, a method includes positioning a portion of a trocar into a patient cavity and inserting a surgical instrument into the trocar. The method also includes measuring, by a pressure sensor disposed in, on, or through a medical appliance, a pressure indicative of a pressure in the patient cavity. The method also includes supplying, based at least in part on the measured pressure, an insufflation gas to the patient cavity by providing the insufflation gas through the trocar.

A bi-directional depth stop for use with biopsy instrument including a body and a pair of blades. The body defines a channel sized to receive a cannula associated with the biopsy instrument. The channel includes a first pair of opposing concave surfaces and a second pair of opposing concave surfaces. The first pair and second pair of opposing concave surfaces together form a superimposed bi-oval-shaped cross-section. Each blade of the pair of blades projects inwardly into a concave surface of the first pair of opposing concave surfaces such the pair of blades are disposed on an opposing side of the body. In some instances, the concave surfaces may be beneficial to provide rotation of the dept stop in two directions rather than a single direction.

An apparatus for penetrating bone and accessing bone marrow is provided. The apparatus may include a penetrator assembly and a powered drill to penetrate the bone into the bone marrow. The penetrator assembly may include a trocar having a stylet. The penetrator assembly may also include an outer penetrator having a hollow cannula and a luer lock attachment. The powered drill may include a housing enclosing a motor and a power supply and associated circuitry. The powered drill may also include a connector receptacle for receiving a penetrator assembly connector of the penetrator assembly. The connector receptacle may releasably lock the penetrator assembly connector into place with the powered drill. The power supply may include a rechargeable battery within the housing for supplying power to the motor. A battery indicator may be provided to indicate a level of the battery.

Devices and implantation methods utilizing subcutaneous placement into a patient are disclosed for the insertion, advancement and positioning of a subcutaneous implantable medical device (SIMD) such as a medical electrical lead. The device for implanting the SIMD is configured having a pre-biased distal curve for creating a pathway to an implant location within a substernal space.

A detection device for recognizing the epidural space is provided. The detection device includes an upper case having a predetermined shape and a lower case coupled to the upper case to form a predetermined space part. A connection tube is provided at a predetermined position of the space part, one end of the connection tube communicates with a paracentesis needle part and the connection tube communicates with a pressure sensor for measuring pressure at a predetermined position of an outer peripheral part thereof. When the paracentesis needle part reaches the epidural space, the device allows a medicine injection catheter to be inserted into the connection tube thereby reaching the epidural space, with the connection tube and the paracentesis needle part connected to each other.

A needle assembly includes an outer cannula having a distal end portion, the distal end portion comprising a sharp bevel facilitating insertion of the needle assembly into a subject. The needle assembly further includes an inner cannula slidably disposed coaxially in the lumen of the outer cannula and movable between an extended position and a retracted position, the inner cannula having a blunt distal end portion extending beyond the sharp bevel of the outer cannula whenever the inner cannula is in the extended position. The needle assembly further includes a bias coupled to the inner cannula in a manner favoring automatic positioning of the inner cannula at the extended position. The needle assembly includes a valve located in fluid communication with the lumen of the inner cannula to allow fluid to exit the subject through the inner cannula, and to prevent ingress of fluid into the subject.